TW201628736A - Process optimisation for a strip casting system - Google Patents

Abstract

The invention relates to a strip casting system (1) comprising a driven continuous band (4), a casting device (5), at least one drying device (8a..8d, 9a..9d), and a system process computer (12) that acts at least on the at least one drying device (8a..8d, 9a..9d). In addition to the system process computer (12), a model process computer (13) is also provided, which acts on a model of the strip casting system (1) and calculates a value and/or course at least of an operating parameter (x, n, T) of the drying device (8a..8d, 9a..9d) in relation to a change of an operating state of the strip casting system (1). The calculation is carried out in parallel to, and independent of the process currently taking place on the strip casting system (1), and the result is loaded into the system process computer (12) in the event that the operating state change is required. The invention also relates to an operating method for a strip casting system (1) of this type, as well as a computer program product and a computer for the process optimisation of a strip casting system.

Description

Optimized program for belt casting equipment

The present invention relates to a belt casting apparatus comprising an endless belt guided and driven by a roller, a casting device disposed above the belt, at least one drying device, and a device program computer acting on at least the drying device. Further, the present invention relates to a method of manufacturing a film or a sheet on a belt casting apparatus in which an endless belt guided by a roller is driven, and a material for forming the sheet/film is coated with a casting device, and The equipment program computer adjusts at least one drying device that acts on the material being coated. Finally, the invention also relates to a computer program product for optimizing the program of a belt casting apparatus and a computer comprising a computer program running thereon.

Belt casting equipment of the type described above and methods of operation thereof are generally known, and are generally used to make sheet or film materials. For example, for the production of photographic film, film for LCD screens, or for the manufacture of engineered stones ("Engineered Stone") and wood materials (such as chipboard plywood, laminates, etc.). Therein, a liquid or pasty material is applied to the driven/moving tape and the at least partially solidified material is peeled off. For example, the liquid film can be cast on an endless belt and subjected to different procedures such as heating, stretching, drying, etc., and then peeled off the tape.

Each program is difficult to measure or extremely measurable, making program adjustments more difficult. Evaporating the solvent contained in the coated material is particularly difficult because the solvent content of the film is not measurable or extremely difficult to measure, and the film needs to undergo a fairly precise drying process. Ensure that the quality of the product meets the requirements. The film should not be dried too fast, otherwise there is a risk that the film will break or the quality will not meet the requirements, and it should not be too slow, otherwise it will adhere to the coiler used to take up the finished film.

Therefore, the integrated control/regulation of the belt casting equipment during operation is generally taken over by the equipment program computer, in which the model of the real belt casting equipment is mapped or operated, and the model is used to adjust the real program. The operating parameters of the casting program that are not obtained for technical or economic reasons can be obtained by the equipment program computer in this way (for example analog) and taken into account when controlling the belt casting equipment. It should be pointed out here that the program computer is also commonly used to express the term program controller, so the term can be used as a synonym for the program computer.

In addition, DE 39 01 378 A1 discloses the use of a model program computer for optimizing the papermaking process currently running on production equipment.

Due to the complexity of the program, it usually takes a lot of effort and time to achieve a steady state of production speed and product quality. Various products are generally manufactured on belt casting equipment, and the products are changed at regular intervals, so they must be periodically adjusted to achieve the desired state. Due to the large control technology problems, the principle of trial and error is often followed, resulting in a large number of undesired waste products.

In view of the above, it is an object of the present invention to provide an improved ribbon casting apparatus, an improved production program, an improved computer program product, and an improved computer including the computer program. In particular, the present invention is directed to regulating production processes to reduce defect rates, increase production speed, and ensure product quality meets requirements. This is especially relevant for the start-up procedure when the belt casting equipment is put into use and the product to be manufactured is changed on the belt casting equipment.

The solution for achieving this object of the present invention is a belt casting apparatus of the aforementioned type, further comprising a model program computer acting on the model of the belt casting apparatus, the model program computer being designed for casting in the belt Changing the belt casting in the equipment model The working state of the device is the target, and a value and/or a characteristic curve of the working parameter affecting at least one pair of the running devices on the belt casting device is calculated, and the calculation system is current on the belt casting device The running program is performed in parallel and is not affected by the program, and the value and/or the characteristic curve is loaded into the device program computer when the working state is required to be changed.

Another solution for achieving this object of the present invention is a method of operating a belt casting apparatus in which a model program computer for a model of the belt casting apparatus is targeted for changing the working state of the belt casting apparatus. Calculating a value and/or a characteristic curve of an operating parameter affecting at least one pair of the running operations on the belt casting apparatus, and the calculating is performed in parallel with the currently running program on the belt casting apparatus and It is not affected by the program, and the value and/or the characteristic curve is loaded into the device program computer when it is required to change the working state.

Another solution for achieving the object of the present invention is a computer program product storing a computer program comprising a model of a belt casting device and a model program computer acting on the model of the belt casting device, and can be Loading the working memory of the computer, and when the computer program is executed in the computer, the computer program can change the working state of the model of the ribbon casting device, and calculate at least the drying device included in the model of the belt casting device A value and/or characteristic of an operating parameter that affects the program simulated by the belt casting equipment model. When the computer program is executed in the computer, the method of the aforementioned type is specifically implemented.

A further solution of the present invention for achieving the object is a computer storing a computer program comprising a model of a belt casting device and a model program computer acting on the model of the belt casting device, which can be loaded The working memory of the computer, and when the computer program is executed in the computer, the computer program can change the working state of the belt casting device model, and calculate at least one of the drying devices included in the belt casting device model The value of the operating parameter that affects the program simulated by the belt casting equipment model and / or characteristic curve. When the computer program is executed in the computer, the method of the aforementioned type is specifically implemented.

The advantage is that the production process can be optimized in a virtual way, so no waste is generated and turned into reality when the desired goal is achieved. In particular, it is possible to prepare for product changes in the background, so that product changes can be quickly and smoothly implemented on real belt casting equipment. Among them, it is preferable to take into consideration the initial situation that is repeatedly changed. Therefore, it is not always changed to a specific product in the same way, because depending on the specific working state of the belt casting equipment, there are always different initial conditions, and the model program computer can take it into consideration accordingly.

For this reason, "changing the working state" can be understood in particular to change the product manufactured on the belt casting equipment, or can be understood as the use of the belt casting equipment.

Accordingly, the object of the invention is achieved in particular by a belt casting apparatus of the aforementioned type, which further comprises a model program computer acting on the model of the belt casting apparatus, the model program computer being designed for: - manufacturing The first product is the object of calculating at least one value and/or characteristic of the operating parameter that is adapted to affect the program running on the belt casting apparatus, during which the initial of the belt casting apparatus is performed The manufacture of the second product on the state and/or belt casting equipment has no effect, and - when the first product is required to be manufactured, the above values and/or characteristic curves of the at least one operating parameter are loaded into the equipment program computer.

Accordingly, the object of the invention is also achieved in particular by a method of manufacturing a first/second product on a belt casting apparatus, the method comprising the steps of: - driving an endless belt guided by a belt roller, - The casting device coats the raw material for manufacturing the first/second product, and controls/adjusts at least one drying device acting on the coated material with a device program computer, Characterized in that - at least one suitable for operating parameters of a program running on a belt casting apparatus is used as a model program for a belt casting apparatus for the purpose of manufacturing a first product. a value and/or characteristic curve, wherein during the calculation, the second product is fabricated on the belt casting apparatus in a manner unaffected by the calculation, or the belt casting apparatus is in an initial state, and - when manufacturing is required to be first In the case of the product, the above values and/or characteristic curves of the at least one operating parameter are loaded into the device program computer.

It is particularly advantageous if the value and/or the characteristic value of the at least one operating parameter is calculated from an initial state which is substantially identical to the state in which the belt casting device is currently in the actual state. “Basic” here means, “the true state of the belt casting equipment is detected and reproduced accordingly, depending on the possibilities offered by the sensors used”. This makes it possible to carry out the starting procedure and/or the product change very quickly, since this is calculated from the current state of the belt casting equipment, rather than from the standard initial state.

It should be pointed out here that DE 39 01 378 A1 only addresses the application of the model program computer in connection with the optimization of the papermaking and current operating procedures. It does not disclose the optimization of work state changes (eg, switching from initial state to product production or product change).

Other beneficial technical solutions and improvements of the present invention are included in the dependent items and the description of the drawings.

Advantageously, the rotational speed of the fan of the drying device and/or the temperature of the heater of the drying device and/or parameters relating to the rotational speed or temperature are set as operating parameters. These operating parameters are operational parameters that have a large impact on the production process and contribute to the desired state of the belt casting equipment (with the corresponding parameter settings).

Advantageously, the model program computer is designed to calculate the endless belt and/or the casting device with the aim of changing the working state of the belt casting apparatus in the belt casting equipment model (or to manufacture the first product) At least one pair of runs on the belt casting equipment And generating a value and/or a characteristic curve of the affected operating parameter, and the calculating is performed in parallel with the program currently running on the ribbon casting device and is not affected by the program, and is required to change the working state (or require manufacturing) The first product) loads the value and/or the characteristic curve into the device program computer. In particular, the speed of the belt and/or the amount of feed to the casting device and/or parameters associated with the speed or the amount of feed may be set as operating parameters. These parameters are also important parameters that have an impact on the film manufacturing process and are therefore preferably handled by conditioning techniques.

Advantageously, operational variables for the at least one drying device/the annulus/the casting device are provided as operating parameters. That is to say that the at least one drying device/the ring belt/the casting device is controlled and the operating variables for the devices are set accordingly as operating parameters.

Further advantageously, at least one adjustment device is coupled to the at least one drying device/the annulus/the casting device and the target variable for the adjustment device is provided as an operating parameter. That is, the at least one drying device/the annulus/the casting device is adjusted and the adjustment variables for the devices are set accordingly as operating parameters.

Particularly advantageously, the device program controller acts on an operational model that forms a subset of the ribbon casting device model and is not included at the input of the operational model by a sensor connected to the device program controller form. In order for the device program controller to obtain the most realistic interpretation of the actual running program, the sensor is set to obtain the parameters of the manufacturing program, as technical and economical conditions permit. For example, such parameters may relate to quality characteristics (eg, density, transparency, number and size of inclusions of air and/or foreign matter, flatness, etc.) or solvent content of the finished film. In addition, measurement techniques can be used to obtain, for example, belt speed, air temperature, air humidity, and the like. Since the equivalent is obtained through measurement techniques, it is naturally not necessary to simulate/make the value. As a result, the operational model running in the device program computer is closer to reality and is likely to be closer to reality than the ribbon casting device model running in the model program computer. Thus, the experience gained from this operational model can also be used to continually improve the model of the belt casting equipment to make it more realistic. Match.

It is particularly advantageous to calculate the value and/or characteristic of the at least one operating parameter with the goal of achieving a stable operating state or a maximum belt speed or a minimum material usage in a minimum energy consumption or in a short time. In this way, the program running on the belt casting equipment can achieve excellent economic benefits. Among them, the corresponding premise is established and the program to be simulated is optimized based on this premise. According to another advantageous embodiment, the quality of the finished film is considered (supplementally or alternatively) as a premise, and the at least one work is calculated with the aim of the desired quality of the finished film/the finished body. The value of the parameter and / or characteristic curve. For example, the quality may relate to the density of the finished film, its transparency, the number and size of inclusions of air and/or foreign matter, flatness, and the like.

Particularly advantageously, according to the heat transfer formula And mass transfer formula Calculating the change in the working state (or the manufacture of the first product), wherein For heat flow, α is the heat transfer coefficient, A is the area available for the heat flow, and ΔT is the temperature difference between the air delivered by the drying device and the surface of the plate/the film T _∞ ^- T _surface , For mass flow, For the mass of the mole, β is the mass transfer coefficient, For gas phase molar density, For gas phase molar fraction, and For the phase boundary Mohr rate. These formulas describe the drying procedure of the film, wherein Expressed as a heat flow that flows into the film as it is dry, and Indicates the mass flow rate of the solvent evaporated from the raw material. Basically depends on the power of the drying unit. A corresponds to the (free) surface of the film. Further, the physical unit of the above parameters is given as a supplement.

Heat flow [J‧s ^-1 ]

α heat transfer coefficient [J‧s ^-1 ‧m ^-2 ‧K ^-1 ]

A area available for this heat flow [m ² ]

△T temperature difference T _∞ -T _surface [K]

Mass flow [kg‧m ^-2 ‧s ^-1 ]

Moor mass [kg‧mol ^-1 ]

β mass transfer coefficient [m‧s ^-1 ]

Gas phase molar density [mol‧m ^-3 ]

Gas phase molar fraction or mass fraction [-]

Phase boundary molar fraction or mass fraction [-]

It should be pointed out here that the solution and its advantages disclosed for the manufacturing method are equally applicable to the disclosed device and vice versa.

In order to more clearly understand the present invention, the present invention will be described in detail below with reference to the drawings.

1‧‧‧Belt casting equipment

2, 3‧‧‧with roller

4‧‧‧环带

5‧‧‧ casting device

6a...6d‧‧‧ chamber

7‧‧‧steering roller

8a...8d‧‧‧fan

9a...9d‧‧‧heating coil

10a...10d‧‧‧Air outlet

11‧‧‧Winding machine/winding device

12‧‧‧Device program computer

13‧‧‧Model program computer

14‧‧‧ Film/Sheet

15a...15e‧‧‧ sensor

L‧‧‧ solvent content

M‧‧‧ coating amount

n, n8a, n8b‧‧‧ fan speed

Q‧‧‧Quality

S‧‧‧distance

t‧‧‧Time

T, T9d‧‧‧Starting temperature of heating coil

V‧‧‧speed

x‧‧‧General operating parameters

The drawings are simplified schematic views, wherein: Figure 1 is a first exemplary schematic view of a belt casting apparatus; Figure 2 is an exemplary characteristic curve of a solvent content in a film made by the belt casting apparatus; An exemplary characteristic curve of the belt speed at the start of the belt casting apparatus; FIG. 4 is a desired quality characteristic curve of the formed film; FIG. 5 is another exemplary parameter characteristic curve when the belt casting apparatus is started; FIG. Two exemplary characteristic curves of solvent content in a film made by a belt casting apparatus; and Figure 7 is another example of a belt casting apparatus that includes a series of inductors for acquiring program parameters.

In the different embodiments, the same components are denoted by the same reference numerals and the same component names, and all the disclosures contained in the specification are applicable to the same components having the same symbols or the same component names as appropriate. The descriptions of the orientations selected in the manual are related to the related drawings as above, below, and on the side, and the orientation is changed as appropriate for the new orientation. Moreover, the individual features or combinations of features included in the various embodiments illustrated and described form a stand-alone solution, an innovative solution, or a solution in accordance with the present invention.

Figure 1 shows a belt casting apparatus 1 comprising an endless belt 4 (mostly made of metal) guided and driven by belt rolls 2, 3 and a casting device 5 arranged above the belt 4. The belt rolls 2, 3, the endless belt 4 and the casting device 5 are provided in the first chamber 6a. Furthermore, the belt casting apparatus 1 comprises a number of other chambers 6b...6d, each of which is provided with a plurality of deflection rollers 7. The chambers 6a...6d are each connected to a drying device, which in this particular example has a fan 8a...8d and a heater or heating coil 9a...9d. Each of the drying devices 8a...8d, 9a...9d is also provided with an outlet 10a...10d connected to the chambers 6a...6d. Further, the belt casting apparatus 1 further includes a coiler 11 or a winding device, a device program computer 12, and a model program computer 13.

In principle, a plurality of drying devices 8a...8d, 9a...9d can be provided for one of the chambers 6a...6d, that is to say, a plurality of fans 8a...8d and heating coils 9a...9d can be provided for each of the chambers 6a...6d. Furthermore, each of the chambers 6a...6d can also be provided with a plurality of outlets 10a...10d and/or inlets. The number of drying devices 8a...8d, 9a...9d need not necessarily coincide with the number of inlets and/or outlets 10a...10d, that is, the number of inlets/outlets 10a...10d may also be more or less than the drying devices 8a...8d, 9a...9d. The number of entries may also differ from the number of outlets 10a...10d. Furthermore, it is also possible in principle to use chambers 6a...6d which are not provided with drying devices 8a...8d, 9a...9d. Finally, a plurality of chambers for the belt 4 or the coated material can be placed in the zone of the annulus 4. The above description of the chambers 6a...6d is also applicable to such chambers as appropriate.

The function of the belt casting apparatus 1 shown in Fig. 1 is as follows: a liquid or paste material is applied to the endless belt 4 by means of a casting device 5, which is moved in a prescribed direction by the belt rolls 2, 3. At least one of the belt rolls 2, 3 is driven by a motor. The material applied to the belt 4 is smoothed and/or left to spread. The raw material contains a volatile component such as a solvent which escapes in the chamber 6a, so that the raw material is slightly dried and hardened. At the left end of the chamber 6a, at least partially solidified material is separated from the annulus 4 and enters the chamber 6b as a sheet or film 14. The material travels there around several deflection rolls 7 and is gradually dried further. This procedure is repeated in chambers 6c and 6d until the final degree of drying of film 14 allows it to be wound onto reel/winding device 11.

To speed up the drying and to perform it in a controlled manner, the equipment program computer 12 controls the fans 8a...8d and the heating coils 9a...9d in a manner that enables the solvent content in the film 14 to form a desired or predetermined characteristic curve.

2 shows an exemplary characteristic curve of the normalized solvent content L in the film 14 with the distance s or time t as the abscissa. Therein, each segment corresponds to a chamber 6a...6d. As is clear from the figure, the solvent content L is gradually reduced with different gradients. The procedures that run between them are complex and difficult to predict. Further, the solvent content L is difficult to measure. However, it is still required that the solvent content L be reduced in a desired or predetermined manner. The film 14 cannot be dried too fast, otherwise there is a risk that the film breaks or the quality does not meet the requirements, and it cannot be too slow, otherwise it will adhere to the coiler 11. In the case of efficient production of film 14, it is often required that belt 4 reach the highest possible speed.

The integrated control/regulation of the belt casting equipment 1 during operation is taken over by the equipment program computer 12. Due to the complexity of the program, it takes a lot of effort and time to achieve a steady state of production speed and product quality. Various products are generally manufactured on the belt casting equipment 1, and the products are changed at regular intervals, so that they must be periodically adjusted to achieve the desired state. As mentioned above, since, for example, the solvent content L is difficult to measure or even impossible to measure, the trial and error principle is usually followed, resulting in a large amount of undesired waste.

To this end, the model program computer 13 is used to assist the device program computer 12, which acts on the model of the belt casting apparatus 1 and is designed to change the working state of the belt casting apparatus 1 in the belt casting equipment model. Objective, calculating a value and/or a characteristic curve of the operating parameter affected by the program run on at least one pair of belt casting apparatuses 1 of the drying devices 8a...8d, 9a...9d, and the calculation system and the belt casting apparatus 1 The currently running program is performed in parallel and is not affected by the program, and the value and/or characteristic curve is loaded into the device program computer 12 when it is required to change the operating state.

Thus, a method of manufacturing a film 14 or a plate on a belt casting apparatus 1 comprises the steps of: - driving an endless belt 4 guided by rollers 2, 3, - coating the material for forming the plate/film 14 with a casting device 5, - controlling/adjusting at least one drying device 8a...8d, 9a...9d acting on the applied material by means of a device program computer 12, And - with the aim of changing the working state of the belt casting apparatus 1, the model program computer 13 used as a model for the belt casting apparatus 1 calculates at least one pair of belt casting apparatuses 1 of the drying apparatuses 8a...8d, 9a...9d The program being run produces values and/or characteristic curves of the affected operating parameters. Here, the calculation is performed in parallel with the program currently running on the belt casting apparatus 1 and is not affected by the program, and the calculated value/characteristic curve is loaded into the device program computer 12 when it is required to change the operating state. Thus, the belt casting apparatus 1 can be started well when it is put into use or changed.

Therefore, the method for producing the first/second product on the belt casting apparatus 1 preferably comprises the steps of: - driving the endless belt 4 guided by the belt rolls 2, 3, - coated by the casting device 5 for Manufacturing the raw material of the first/second product, - controlling/adjusting at least one drying device 8a...8d, 9a...9d acting on the coated material with the equipment program computer 12, and - aiming at manufacturing the first product The model program computer 13 used as a model for the belt casting apparatus 1 calculates at least one value of the operating parameters suitable for the program running on the belt casting apparatus 1 and at least one of the drying devices 8a...8d, 9a...9d a characteristic curve in which during the calculation, the second product is produced on the belt casting apparatus 1 in a manner unaffected by the calculation, or the belt casting apparatus 1 is placed in an initial state, and - when manufacturing is required to be made first In the case of the product, the above values and/or characteristic values of the at least one operating parameter are loaded into the device program computer 12.

It is particularly advantageous if the value and/or the characteristic value of the at least one operating parameter is calculated from an initial state which is substantially identical to the state in which the ribbon casting apparatus 1 is currently present. In this way, the start-up procedure and/or product change can be carried out very quickly, since this is from the belt casting The state in which the device 1 is currently in its actual state is calculated rather than starting from the standard initial state.

Of course, the model program computer 13 can also be used to optimize the currently running program. Among them, the change is made in the model of the belt casting apparatus 1 and its effect is observed. If it is found that the setting is better than the real program, the model program computer 13 loads the setting into the device program computer 12.

Conversely, the model of the ribbon casting apparatus 1 can be continuously adjusted and matched to the actual condition by the value in the device program computer 12.

Figures 3 to 5 purely exemplify several device parameters when the belt casting apparatus 1 is started. Figure 3 shows an exemplary characteristic of the belt speed v versus time. As shown in Fig. 3, the belt speed v linearly rises from zero to a stationary value. During this start-up, the required quality Q is kept substantially constant throughout the entire period of time and reaches a desired level or preset level, see Figure 4. The quality Q is set here as an abstract value. Of course, there are actually a large number of criteria for judging the quality of the film 14 to be formed. For example, density, transparency, the number and size of inclusions of air and/or foreign matter, flatness, and the like can be considered. Thus, in FIG. 4, the quality Q can be, for example, a determined parameter, but can be, for example, a parameter (weighting) and or other indicator that can reflect the quality Q of the sheet 14.

To achieve this goal, the operating parameter x of the belt casting apparatus 1 is preset in a specific manner.

By way of example, the rotational speed of the fans 8a...8d of the drying device and/or the temperature of the heaters 9a...9d of the drying device and/or the parameters relating to the rotational speed or the temperature can be set as the operating parameter x.

As an alternative or in addition to the aforementioned speed of the belt 4, for example, the feed amount of the casting device 5 and/or the parameters relating to the speed or the feed amount can also be set as the operating parameter x. That is, not only the parameters relating to the drying devices 8a...8d, 9a...9d can be calculated in the model program computer 13, but the model program computer 13 can also be designed to change the belt casting device 1 in the belt casting equipment model. The operating state (or manufacturing of the first product) is targeted to calculate the influence of the program running on at least one pair of belt casting equipment 1 of the belt 4 and/or the casting device 5 The value and/or characteristic curve of the operating parameters, and the calculation is performed in parallel with the program currently running on the belt casting apparatus 1 and is not affected by the program, and is required to change the working state (or require the manufacture of the first product) This value and/or characteristic curve is loaded into the device program computer 12.

FIG. 5 purely exemplarily shows a characteristic curve of a plurality of operating parameters x, which are specifically the rotational speed n8a of the fan 8a, the rotational speed n8b of the fan 8b, the initial flow temperature T9d of the heating coil 9d, and the casting device 5 Feed amount M.

It is expressly pointed out here that the above characteristic curves are for illustrative purposes only and do not necessarily reflect actual conditions. Furthermore, only a small portion of the actually influential operating parameters x are arbitrarily shown so that the relevant illustrations are clear at a glance. It should also be noted that there is not necessarily only one solution to achieve the goals shown in Figures 3 and 4, but there are other ways to achieve the same goal. Moreover, the settings shown in Figs. 3 and 4 are only optional, and other settings can be made when the belt casting apparatus 1 is started.

The calculation of the value of the operating parameter x and/or the characteristic curve can be achieved not only for the quality Q to be achieved, but also for the lowest energy consumption or for the shortest time t1 to reach a stable working state or a maximum belt speed v or a minimum material amount M. .

In general, according to the heat transfer formula And mass transfer formula Calculate the change in working condition (or the manufacture of the first product), where To enter the heat flow of the film 14, α is the heat transfer coefficient in the film 14, A is the area available for heat flow on the film 14, and ΔT is the temperature difference between the air delivered by the drying device and the surface of the film T _∞ -T _Surface , For mass flow out of film 14, For the mass of the mole, β is the mass transfer coefficient, For gas phase molar density, For gas phase molar fraction, and For the phase boundary Mohr rate. These formulas describe the drying procedure for film 14.

Fig. 6 exemplarily shows a time-space-dependent characteristic curve of the solvent content L of different products/films 14. As is clear from the figure, the solvent content L is reduced in different ways. Starting from the (steady state) program currently running on the ribbon casting apparatus 1 in accordance with the upper characteristic curve, the mode The type program computer 13 can prepare for switching another product independently (i.e., offline) by means of the model of the belt casting apparatus 1, and then, for example, obtains the lower characteristic curve. When the actual (prepared) product change is actually made, the operating parameter x is loaded into the device program computer 12 to implement the new program in accordance with the lower characteristic curve.

Figure 6 can also be explained as follows: it is a solvent content characteristic curve for the same product made with different operating parameters x. Higher evaporation is generally preferred, meaning that the lower curve is generally preferred. Starting from the (steady state) program currently running on the belt casting apparatus 1 in accordance with the upper characteristic curve, the model program computer 13 can independently (ie, offline) optimize the program in the model of the belt casting apparatus 1, and then For example, the lower characteristic curve is obtained, for example, the belt speed v is increased, the energy consumption is lowered, but the quality Q remains unchanged. When such a result occurs, the operating parameter x is loaded into the device program computer 12 so that the real program is also pressed down to the characteristic curve.

Figure 7 additionally shows a belt casting apparatus 1 in which a control line for driving the belt roller 2 and a control line leading to the casting device 5 and the coiler 11 are also shown. The suitability of the operating parameter x for driving the belt roller 2 and for the casting device 5 has been previously described. For example, the coiler 11 can be controlled in terms of the tensile stress to be applied to the film 14. Of course, the deflection roller 7 can in principle also be controlled in order to achieve the desired characteristic curve of the tensile stress over the distance s.

In addition, sensors 15a...15e are also provided in Fig. 7, which can be used, for example, to measure the solvent content L of the film 14, and can also be used, for example, to obtain quality parameters of the film 14 (e.g., density, transparency, air, and/or Or the number and size of inclusions of foreign bodies, flatness, etc.). Of course, different sensors 15a...15e can be used as well as a greater or lesser number of sensors 15a...15e, and the sensors 15a...15e can be located at other locations as well. Therefore, Figure 7 is only used to illustrate the principle of use of the inductors 15a...15e. The true state of the program can be detected at least in part by the sensors 15a...15e. Accordingly, the device program computer 12 can be applied to an operation model which is configured as a belt casting device module provided for the model program computer 13. A subset of the type. Inputs not included in the operational model are formed by sensors 15a...15e of the connected device program computer 12. That is, the model running in the device program computer 12 (only) simulates or builds a portion of the ribbon casting device 1 that is not detected by the sensors 15a...15e.

It should be noted here that not only the model program computer 13 has the model of the belt casting apparatus 1, but also the apparatus program computer 12 also has a model without providing the sensors 15a...15e capable of accurately and completely reproducing the real program. Both models can adopt the same structure, but the real program can also be adjusted with the support of the sensors 15a...15e. In this case, the operational model running in the device program computer 12 constitutes a subset of the ribbon casting equipment model running in the model program computer, except that the ribbon casting equipment model is signaled by the sensors 15a...15e. Supplements can better reflect real procedures. As previously mentioned, the "experience" from the operational model can be entered into the model of the belt casting machine of the model program computer 13 and improved.

In addition, it should be additionally noted that the belt casting apparatus 1 can also have a lower adjustment circuit in particular. For example, the rotational speed n of the fans 8a...8d may be adjusted according to the required air volume, or the initial flow temperature T of the heating coils 9a...9d may be adjusted depending on the temperature of the air flowing into the chambers 6a...6d. That is to say, not only the manipulated variable for the at least one drying device 8a...8d, 9a...9d/ring 4/casting device 5 can be provided as the operating parameter x, but also the target variable can be set as the operating parameter. In the first case, the devices of the belt casting apparatus 1 (i.e., for example, the fans 8a...8d, the heating coils 9a...9d, the endless belt 4 or the casting device 5) are controlled and arranged accordingly for the devices The manipulated variable is used as the operating parameter x. In the second case, the target variable is set for the operating parameter x processed by the lower stage regulating device. Of course, the lower adjustment device does not have to be spatially separated from the device program controller 12 or the model program controller 13, but the adjustment device and the control device can map one or several electronic switch circuits/devices in any grouping manner. in. The devices of the belt casting apparatus 1 preferably communicate via a busbar system, but this is not a requirement, and communication can be realized in other ways.

In Fig. 1, the drying air delivered by the fans 8a...8d simply passes through the outlet 10a... 10d is discharged to the surrounding environment for the purpose of simplifying the illustration. It is of course possible to filter the drying air before it is discharged, especially if the drying air contains solvent vapor and/or is returned to improve the energy efficiency of the belt casting apparatus 1.

In addition, although the drawing illustrates the procedure optimization of the film 14 manufacturing process, the disclosed technical principles are also applicable to other products such as sheets or plates as appropriate.

The above embodiment indicates a possible embodiment of the belt casting apparatus 1 of the present invention, and it should be noted that the present invention is not limited to the embodiments described in the above, but the skilled person can also rely on the technical implementation principle. The ability to make changes to combine individual implementations in various ways. That is, all possible implementations that combine the individual technical details of the illustrated and illustrated embodiments are included in the scope of protection.

It is specifically noted that the illustrated device may actually include more or less than the illustrated number of components and is occasionally shown simplified in the drawings.

Finally, it is pointed out that the illustrated device and its component parts are not shown to scale and/or enlarged and/or reduced for the sake of clarity.

The purpose of the independent innovation solution is to be included in the specification.

1‧‧‧Belt casting equipment

2, 3‧‧‧with roller

4‧‧‧环带

5‧‧‧ casting device

6a...6d‧‧‧ chamber

7‧‧‧steering roller

8a...8d‧‧‧fan

9a...9d‧‧‧heating coil

10a...10d‧‧‧Air outlet

11‧‧‧Winding machine/winding device

12‧‧‧Device program computer

13‧‧‧Model program computer

14‧‧‧ Film/Sheet

Claims (15)

A belt casting device (1) comprising: an endless belt (4) guided and driven by a belt roller (2, 3), a casting device (5) disposed above the belt (4), at least one drying device (8a...8d, 9a...9d), and a device program computer (12) acting on at least the drying device (8a...8d, 9a...9d), characterized in that it acts on the belt casting device (1) a model program computer (13) of the model, the model program computer being designed to calculate the drying device (8a...8d, with the aim of changing the working state of the belt casting device (1) in the belt casting equipment model At least one pair of 9a...9d) processes and/or characteristic curves of the operating parameters (x, n, T) affected by the program running on the belt casting apparatus (1), and the calculation is performed with the belt casting The currently running program on device (1) is performed in parallel and is unaffected by the program, and when a change in operating state is required, the value and/or the characteristic curve is loaded into the device program computer (12). A belt casting apparatus (1) according to claim 1, characterized in that the rotation speed (n) of the fans (8a...8d) of the drying device and/or the temperature of the heaters (9a...9d) of the drying device are set ( T) and/or the parameter related to the rotational speed (n) or the temperature (T) as the operating parameter (x). A belt casting apparatus (1) according to claim 1 or 2, characterized in that the model program computer (13) is designed to change the working state of the belt casting apparatus (1) in the belt casting apparatus model For the purpose of calculating the value of the working parameter (x, v, M) affected by the program run on at least one pair of the belt casting device (1) and/or the casting device (5) And/or characteristic curve, and the calculation system and the belt The currently running program on the casting device (1) is performed in parallel and is unaffected by the program, and when a change in operating state is required, the value and/or the characteristic curve is loaded into the device program computer (12). A belt casting apparatus (1) according to claim 3, characterized in that the speed (v) of the belt (4) and/or the feed amount (M) of the casting device (5) and/or the speed are set (v) or the parameter related to the feed amount (M) as the operating parameter (x). A belt casting apparatus (1) according to any one of claims 1 to 4, characterized in that it is provided for the at least one drying device (8a...8d, 9a...9d)/the annulus (4)/the casting The manipulated variable of the device (5) is used as the operating parameter (x, n, T, v, M). A belt casting apparatus (1) according to any one of claims 1 to 5, characterized in that at least one adjusting device is connected to the at least one drying device (8a...8d, 9a...9d)/the ring belt (4)/ The casting device (5) is provided with a target variable for the adjustment device as an operating parameter (x, n, T, v, M). A method of manufacturing a film (14) or a plate on a belt casting apparatus (1), comprising the steps of: driving an endless belt (4) guided by a belt roll (2, 3), coated with a casting device (5) Covering the material for forming the plate/film (14), using a device program computer (12) to control/adjust at least one drying device (8a...8d, 9a...9d) acting on the material to be coated, It is characterized in that, by changing the working state of the belt casting apparatus (1), the model program computer (13) used as a model for the belt casting apparatus (1) calculates the drying apparatus (8a...8d, 9a) At least one pair of the operating modules (1) of the belt casting apparatus (1) have a value and/or a characteristic curve of the influence of the operating parameter (x, n, T), and the calculation is performed with the belt casting apparatus (1) The currently running program runs in parallel and is not affected by the program, and loads the value and/or the characteristic curve when it is required to change the working state. The device program computer (12). The method of claim 7, wherein the device program computer (12) acts on an operational model that forms a subset of the ribbon casting device model and is not included in the input of the operational model. A sensor (15a...15e) connected to the device program computer (12) is formed. The method of claim 7 or 8, characterized in that the at least one job is calculated with a minimum energy consumption or a minimum working time or a maximum belt speed (v) or a minimum material amount (M) in a minimum time (t). The value and/or characteristic of the parameter (x, v, n, T, M). The method of any one of claims 7 to 9, characterized in that the at least one operating parameter (x, v) is calculated for the desired quality (Q) of the finished film (14)/the finished body , n, T, M) values and / or characteristic curves. The method of any one of claims 7 to 10, characterized in that, according to the heat transfer formula And mass transfer formula Calculate the change in the working state, where For heat flow, α is the heat transfer coefficient, A is the area available for the heat flow, and ΔT is the temperature difference between the air delivered by the drying device and the surface of the plate/film (14), T _∞ -T _surface , For mass flow, For the mass of the mole, β is the mass transfer coefficient, For gas phase molar density, For gas phase molar fraction, and For the phase boundary Mohr rate. A computer program product storing a computer program comprising a model of a belt casting device (1) and a model program computer (13) acting on the model of the belt casting device, and can be loaded into a working memory of the computer And when the computer program is executed in the computer, the computer program can change the working state of the belt casting equipment model as a target, and calculate a drying device (8a...8d, 9a...9d) included in the belt casting equipment model. At least one pair of the programs simulated by the belt casting equipment model produces values and/or characteristic curves of the operating parameters (x, n, T) that are affected. The computer program product of claim 12, wherein the method of any one of claims 7 to 11 is carried out when the computer program is executed in the computer. A computer storing a computer program comprising a model of a belt casting device (1) and a model program computer (13) acting on the model of the belt casting device, and can be loaded into the working memory of the computer. And when the computer program is executed in the computer, the computer program can change the working state of the belt casting equipment model, and calculate the drying device (8a...8d, 9a...9d) included in the belt casting equipment model. At least a pair of the programs simulated by the belt casting equipment model produce values and/or characteristic curves of the operating parameters (x, n, T) that are affected. The computer of claim 14, wherein the method of any one of claims 7 to 11 is carried out when the computer program is executed in the computer.